Segmental Wedge Meter
A lower cost eccentric Segmental Wedge Venturi has been designed by Amity Flow to replace currently expensive standard ASME Venturi meters and eccentric Venturies used for sand-oil or dirty fluid applications. These segmental wedge venturi meters, or e-wedge meters, are designed with improved cladding ability, similar overall pressure loss, and improved accuracy. Laboratory test results over a wide Reynolds number range confirms accuracy with low overall pressure loss.
Discharge coefficient data for the segmental e-wedge flow meter obtained at the Alden hydraulic laboratory. Discharge Coefficients over the calibration range are within ± 0.08 %.
Employing Computational Fluid Dynamics (CFD) R. W. Miller developed for AMITY FLOW a low overall pressure loss Eccentric Segmental Wedge Venturi. CFD slurry fluid studies indicate that a constant discharge coefficient, low overall pressure loss and minimum upstream lengths are achieved.
Computational Fluid Dynamics pressure plot for the segmental e-wdge meter tested at Alden hydralic lab.
The e-Wedge Venturi has the following advantages over the eccentric Venturi or ASME standard Venturies.
- Discharge coefficients constant over a wider Reynolds number range than eccentric or standard Venturies.
- Overall pressure loss same as an equivalent beta ratio ASME Venturi.
- Substantially lower cost by 1/3 over a standard ASME Venturi..
- Cladding and improved favorable pressure boundary layer control should extend meter life.
- Accuracy ± 1.5 %
- Overall length is considerably less resulting in lower weight.
- The uncalibrated accuracy is expected to improve with additional data obtained with laser segmental area measurement equipment now being developed.
Read more on e-wedge meters and the AMITY Segmental wedge Venturi
